The Amp Garage

I just looked at this thread as I had that fuse issue happening with flashing from the rectifier too. I was a bit short on time so I had to find the issue quickly (other work to be done inside the amp). Found out one of the first filters caps (two in serie) was shorted causing too much current draw...

pompeiisneaks wrote: ↑Sun Jun 06, 2021 3:31 am Did you ensure hte first filter cap isn't too much for the rectifier, they often have a max filter rating for the first filter node post rectifier.

~Phil

Yes, its 49uF...under the 60uF rating of a GZ34.

brewdude wrote: ↑Sun Jun 06, 2021 2:24 am I think I would start with a new rectifier.

Tried different ones so far... 2 new JJ's , Weber Z34 and a New Generic Electron one... same result.

What would you recommend when an amp has a mind of it's own as far as blowing a fuse? I have an amp that seems to blow it when the standby switched is switched from on to off... only sometimes. Also, it may blow the fuse after playing for a while, and then suddenly just blows the fuse. And, sometime...

I figured this out... 2 things I believe were contributing to the problem ... I had bent the cathode pin 3 down toward the chassis (and pin 8) to separate the wire from the wire running from the Grid wire (pin 2 and 7). The Plate wire from Plate Pin 1 and 6 was laying on top of pin 3. This was likel...

It's a new build. The schematic is the AA1164 circuit.
https://el34world.com/charts/Schematics ... aa1164.pdf

All, I have a strange issue that appears to be related \ isolated to the Reverb Circuit of a Princeton clone. When the volume gets above 7 there is a strange crackle \ distortion noise. When V2 is changed from an JJ AT7 (two of these do the same thing) to any AX7, problem goes away. Chopstick test d...

professormudd wrote: ↑Mon May 24, 2021 3:14 pm

jwhousley wrote: ↑Wed May 19, 2021 9:35 pm

professormudd wrote: ↑Fri Feb 19, 2021 6:30 pm Nik at Ceriatone will sell chassis. They come from Malaysia, but I get items from him to California faster than I get items from Arizona.

What does the shipping cost you?

He charged me $72 USD for shipping 2 chassis. That is the shipping cost only. The chassis were also $70/ea.

Thanks!

professormudd wrote: ↑Fri Feb 19, 2021 6:30 pm Nik at Ceriatone will sell chassis. They come from Malaysia, but I get items from him to California faster than I get items from Arizona.

What does the shipping cost you?

Maybe one of these would be useful as a starting place? I strongly encourage you to have a schematic that is an EXACT match to what you're wanting to do along with a layout to go with it prior to ordering parts. There are some editable SCH files of different Dumble amps. And there are schematics an...

are you guys running your low plate classics with a 12AY7 PI like the original 2nd gen amps ? That makes a difference to the volume/gain hitting the output section as it's lower gain than a 12AX7. I put a 12AX7 in mine originally as I thought louder was always better :D but after talking to Tony he...

124 Low Plate Classic it is!!!

Does anyone have a BOM they could share? Also, where is everyone able to find the 300uf caps??

Thanks everyone!

talbany wrote: ↑Wed Feb 10, 2021 4:56 am Thats easy a Low Plate Classic
https://ampgarage.com/forum/viewtopic.php?f=5&t=12872

Tony

Thank you! What if I wanted to build a second amp, maybe more gain compared to the #124 ?

Hello all!! I am about to attempt to build one of the Dumble ODS's. What are the tonal differences in the 124, 102 and Blues Master circuits? Sorry if this question is dumb..... ;-) Thank you. Perhaps you can make it easier on us if you could describe what you're looking for? Style Of music you pla...

Hello all!! I am about to attempt to build one of the Dumble ODS's. What are the tonal differences in the 124, 102 and Blues Master circuits?

Sorry if this question is dumb.....

Thank you.